page cache: Convert find_get_pages_contig to XArray

There's no direct replacement for radix_tree_for_each_contig()
in the XArray API as it's an unusual thing to do.  Instead,
open-code a loop using xas_next().  This removes the only user of
radix_tree_for_each_contig() so delete the iterator from the API and
the test suite code for it.

Signed-off-by: Matthew Wilcox <willy@infradead.org>

1 files changed, 0 insertions, 23 deletions

diff --git a/tools/testing/radix-tree/regression3.c b/tools/testing/radix-tree/regression3.c
index ace2543c3eda..9f9a3b280f56 100644
--- a/tools/testing/radix-tree/regression3.c
+++ b/tools/testing/radix-tree/regression3.c
@@ -69,21 +69,6 @@ void regression3_test(void)
                         continue;
                 }
         }
-        radix_tree_delete(&root, 1);
-
-        first = true;
-        radix_tree_for_each_contig(slot, &root, &iter, 0) {
-                printv(2, "contig %ld %p\n", iter.index, *slot);
-                if (first) {
-                        radix_tree_insert(&root, 1, ptr);
-                        first = false;
-                }
-                if (radix_tree_deref_retry(*slot)) {
-                        printv(2, "retry at %ld\n", iter.index);
-                        slot = radix_tree_iter_retry(&iter);
-                        continue;
-                }
-        }
 
         radix_tree_for_each_slot(slot, &root, &iter, 0) {
                 printv(2, "slot %ld %p\n", iter.index, *slot);
@@ -93,14 +78,6 @@ void regression3_test(void)
                 }
         }
 
-        radix_tree_for_each_contig(slot, &root, &iter, 0) {
-                printv(2, "contig %ld %p\n", iter.index, *slot);
-                if (!iter.index) {
-                        printv(2, "next at %ld\n", iter.index);
-                        slot = radix_tree_iter_resume(slot, &iter);
-                }
-        }
-
         radix_tree_tag_set(&root, 0, 0);
         radix_tree_tag_set(&root, 1, 0);
         radix_tree_for_each_tagged(slot, &root, &iter, 0, 0) {